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WO1994014489A1 - Seringue de securite jetable - Google Patents

Seringue de securite jetable Download PDF

Info

Publication number
WO1994014489A1
WO1994014489A1 PCT/US1992/011273 US9211273W WO9414489A1 WO 1994014489 A1 WO1994014489 A1 WO 1994014489A1 US 9211273 W US9211273 W US 9211273W WO 9414489 A1 WO9414489 A1 WO 9414489A1
Authority
WO
WIPO (PCT)
Prior art keywords
assembly
needle
barrel
syringe
forward end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1992/011273
Other languages
English (en)
Inventor
Richard King
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Design and Engineering Associates
Original Assignee
Design and Engineering Associates
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US07/787,915 priority Critical patent/US5188601A/en
Priority claimed from US07/787,915 external-priority patent/US5188601A/en
Application filed by Design and Engineering Associates filed Critical Design and Engineering Associates
Priority to PCT/US1992/011273 priority patent/WO1994014489A1/fr
Priority to US08/027,509 priority patent/US5346474A/en
Publication of WO1994014489A1 publication Critical patent/WO1994014489A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston

Definitions

  • This invention relates to a disposable syringe which initially is provided with its needle retracted within its barrel, in a sterile and safe environment.
  • the needle When used, the needle is engaged by the breakable plunger, and locked in place at the forward end of the syringe. Before disposal, the needle is withdrawn back into the barrel, and the breakable plunger is broken off.
  • the disposed of syringe is incapable of being reused, and there is little or no danger of accidental punctures, because the needle is retained within the syringe barrel.
  • HIV (or AIDS) virus has led to even a greater importance being placed in the use of syringes incorporating retractable needles.
  • the present invention provides a disposable hypodermic syringe wherein the needle is initially provided in a sterile and protected position, and where after an injection is given, the needle is again easily returned to the protected position for safe disposal.
  • One principal object of the present invention was to provide a simple design, having few moving parts, so that the syringe could be readily manufactured from inexpensive, but government approved (i.e., regulatory agency - U.S. FDA) materials that, due to their low cost, are deemed disposable, e.g., injection molded plastics.
  • Another object of the present invention was to design a disposable syringe that would be useful as required, but which after use, would be nearly impossible to reuse, i.e., a one-time-only syringe.
  • the present syringe which consists of five simple components; (1) an injection molded nonbreakable translucent plastic syringe barrel; (2) an injection molded breakable plastic plunger assembly, with (3) a rubber gasket located near the front end thereof (used to form the necessary vacuum) and one portion of a locking mechanism situated at its forward end; a needle assembly, consisting of (4) an injection molded hub including a corresponding portion of the locking mechanism molded in place at the rearward end, and (5) a conventional syringe needle bonded to the forward end of the hub in a manner to allow flow of liquid therethrough, i.e., into and/or out of the syringe barrel.
  • the syringe will have the needle assembly withdrawn into the barrel, with the breakable plunger assembly either engaged or disengaged, (but preferably engaged).
  • the forward tip of the syringe includes a thin segment of plastic or other sealing material so that the interior of the syringe is sterile until use.
  • the breakable plunger assembly is inserted into the rear end of the needle assembly and this combination is pushed forward. The needle pierces the sealing material at the end of the barrel, and the forward tip of the needle assembly fits snugly and securely within the tip of the barrel.
  • the two tip members are designed to provide a frictional interference or wedge fit which will withstand the force typically used during the injection process, but which, with a slight twisting motion on the breakable plunger, can be disengaged when the syringe is to be disposed of.
  • the syringe is filled with the injectable material in a conventional manner, i.e., by pulling back the breakable plunger assembly an appropriate amount.
  • the injection is made by conventionally inserting the needle as appropriate, depressing the breakable plunger, thereby injecting the contents.
  • the breakable plunger assembly is then used to reengage the needle assembly, e.g., by using the locking mechanism such as the preferred 1/4 turn “T” locking means, the needle assembly is locked on and then pulled back into the safety position, i.e., back into the syringe barrel.
  • a score line may be provided at one end of the breakable plunger, and this score line becomes visible only after the needle has been fully retracted into the syringe barrel. Once sufficiently exposed (i.e., with the needle fully retracted), the breakable plunger is snapped off, rendering the syringe incapable of reuse. The needle is safely housed within the barrel and the two pieces may be disposed of.
  • Figure 1 is a partially cut away view of the syringe of the present invention, illustrating the needle in its "on-sale” mode, i.e., in a sterile condition.
  • Figure 2 is a partially cut away view of the syringe of the present invention, showing the positioning of the needle assembly and breakable plunger when ready for use (or immediately after use).
  • Figure 3 is a partially cut away view of the syringe of the present invention, showing the detachment of the breakable plunger assembly, e.g., for filling of the syringe with an injectable material.
  • Figure 4 is a partially cut away view of the syringe of the present invention, showing the positioning of the breakable plunger assembly when an injection is being given (or has been given).
  • Figure 5 is a partially cut away view of the syringe of the present invention, showing the positioning of the breakable plunger assembly and the needle assembly after use, with the breakable plunger assembly being broken off at the score line.
  • Figure 6 is a close up view of the disconnected male and female portions of the preferred 1 /4 turn T" locking mechanisms on the breakabl plunger and needle assemblies respectively.
  • Figure 7 is a sectional view of the connected male and female portions of the preferred 1/4 turn T" locking mechanisms on the breakabl plunger and needle assemblies, as well as the matched tip members of the barrel and needle assembly.
  • the present invention is directed to a disposable safety syringe.
  • the syringe of the present invention consists of an injection molded nonbreakable, translucent plastic barrel 10, which includes a tip portion 12, which, prior to use, is safety sealed at the end of the tip 13.
  • the barrel is advantageously molded to include finger grips 14 at the back end.
  • the syringe of the present invention includes an injection molded, breakable plastic plunger member 16, which includes a thumb pad 17 at its back end, and includes a separate rubber gasket 18 near its forward end.
  • the rubber gasket 18 creates the necessary seal between the forward end of the breakable plunger and the barrel of the syringe, so that the syringe will operate in a conventional manner.
  • the preferred breakable plunger body 16 may be provided with a score line 19, which allows the breakable plunger to be more easily broken off after use, rendering the syringe incapable of reuse.
  • the syringe of the present invention includes a needle assembly consisting of an injection molded hub 20 which includes a tip member 21 and which terminates with a needle 22 at its forward end.
  • the rear portion of hub 20 consists preferably of a 1/4-turn T" receptacle, adapted to accept a corresponding male 1/4-turn "T” member on the forward end of the breakable plunger 16.
  • the very tip of the barrel 13 is injection molded to be closed by a thin plastic membrane, so that the needle can be kept in a sterile position.
  • the needle 22 By pushing the breakable plunger and the needle forward, the needle 22 will push through the plastic membrane 13, and the tip 21 of the needle assembly 20 will fit snugly within tip 12 of the syringe barrel.
  • Plastic tip membrane 13 is advantageously made via a flash area in the mold so the wall of the membrane will have a breakthrough point to allow the needle to pass easily through it. As illustrated in Figure 2, this allows the needle to come forward in its position to be useful for giving an injection.
  • needle 22 has been pushed through tip 13, and now is located outside the syringe barrel 10, in a ready to use position.
  • the tip of the syringe barrel 12 and the tip of the needle assembly 21 have been matched in size to create a wedge fit between the two components.
  • the wedge fit between tips 12 and 21 is one of the necessary components that establish the tight fit for the syringe of the present invention to form a simple vacuum seal.
  • the other vacuum seal component is rubber gasket 18, located near the forward end of breakable plunger 16.
  • Gasket 18 is designed to have a tight tolerance between the inside wall of the syringe barrel, and this tight, but flexible fit, allows the breakable plunger to be easily moved back and forth inside the barrel, thereby enabling the syringe to draw and/or discharge liquids.
  • the gasket is advantageously made of a soft synthetic rubberized material that is regulatory agency (e.g., U.S. - FDA or the like) approved.
  • Figure 3 illustrates the typical positioning of the breakable plunger assembly in the syringe after filling with an injectable solution (not shown).
  • the vacuum seal created by gasket 18 and tips 12 and 21, allows the syringe to be filled with an injectable solution (not shown) as the breakable plunger 16 is pulled back.
  • Figure 4 illustrates the typical positioning of the breakable plunger assembly as the contents of the syringe are being (or have been) injected.
  • gasket 18 on the breakable plunger assembly is preferably shaped in a configuration that creates a wiper effect in the barrel of the syringe, i.e., as it's drawn or pushed inside the barrel, thus maintaining an air tight seal, and ensuring both secure filling of the syringe, and as shown in Figure 4, complete delivery of the syringe contents.
  • the needle assembly is drawn back into the syringe barrel. This is accomplished by mating the preferred male and female 1/4-turn T" members on the front end of the breakable plunger assembly and on the back end of the needle assembly. For a close-up view of these assemblies, see Figure 6.
  • the breakable plunger is withdrawn enough to expose score line 19.
  • the breakable plunger arm may be simply broken off.
  • the score line is created during the molding of the breakable plunger assembly, but it may be created by any means available to the skilled artisan.
  • Figure 7 illustrates in cross-section, the wedge fit between tips 12 and 21 which assures that needle 22 will be held securely in a rigid state during both the filling of the syringe, as well (and most importantly) during the injection of the syringe contents into a patient.
  • the wedge fit is sufficient to prevent the needle from being pushed back during use, but with a simple twist and pulling of the breakable plunger, the needle may be retracted into the syringe barrel for safe disposal.
  • the components of the syringe of the present invention can be manufactured using any available material that meets the criteria of the invention as set forth herein.
  • the plastic material used for the syringe body should be nonbreakable, while the plastic material for the plunger must be a breakable plastic material.
  • the skill artisan can readily select appropriate materials for use in the various components as set forth herein.
  • the manufacturing materials should be those approved by the appropriate governmental agencies, such as the U.S. Food and Drug Administration (FDA) or the like.
  • FDA U.S. Food and Drug Administration

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

On décrit un montage de seringue diminuant considérablement le risque de contamination par contact avec des aiguilles contaminées. Le montage de seringue est muni initialement d'une aiguille (U22) placée à l'intérieur de son cylindre (10), dans un environnement stérile et sûr. Lors de l'utilisation, le piston brisable (16) vient en contact avec l'aiguille, celle-ci étant alors verrouillée en place à l'extrémité avant (12) du cylindre. Avant d'être jetée, l'aiguille est repositionnée à l'intérieur du cylindre, et le piston est brisé. Ainsi la seringue jetable ne peut pas être réutilisée, et il n'y a aucun risque ou peu de risque de perforation accidentelle, l'aiguille étant retenue à l'intérieur du cylindre.
PCT/US1992/011273 1991-11-06 1992-12-29 Seringue de securite jetable Ceased WO1994014489A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US07/787,915 US5188601A (en) 1991-11-06 1991-11-06 Disposable safety syringe
PCT/US1992/011273 WO1994014489A1 (fr) 1991-11-06 1992-12-29 Seringue de securite jetable
US08/027,509 US5346474A (en) 1991-11-06 1993-02-22 Disposable safety syringe

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/787,915 US5188601A (en) 1991-11-06 1991-11-06 Disposable safety syringe
PCT/US1992/011273 WO1994014489A1 (fr) 1991-11-06 1992-12-29 Seringue de securite jetable
US08/027,509 US5346474A (en) 1991-11-06 1993-02-22 Disposable safety syringe

Publications (1)

Publication Number Publication Date
WO1994014489A1 true WO1994014489A1 (fr) 1994-07-07

Family

ID=27363026

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1992/011273 Ceased WO1994014489A1 (fr) 1991-11-06 1992-12-29 Seringue de securite jetable

Country Status (2)

Country Link
US (1) US5346474A (fr)
WO (1) WO1994014489A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008132462A1 (fr) * 2007-04-27 2008-11-06 Safeguard Biosystems Holdings Limited Dispositif d'échantillonnage

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5762635A (en) * 1997-02-18 1998-06-09 Pace; Paul A. Retractable needle syringe
US5484414A (en) * 1994-09-21 1996-01-16 Pace; Paul A. Syringe incorporating a self-contained retractable needle
US5669887A (en) * 1996-04-22 1997-09-23 Cooper; William L. Retractable non-reusable needle
US6267749B1 (en) 1998-12-29 2001-07-31 Safeguard Medical Limited Single use syringe with breakaway plunger
US6530903B2 (en) 2000-02-24 2003-03-11 Xiping Wang Safety syringe
TW471323U (en) * 2000-06-30 2002-01-01 Jeng-Ji Luo Safe injector with easily removable pusher rod
GB2381199A (en) * 2000-07-25 2003-04-30 Hsien-Ming Hsieh A self-destructing syringe
WO2006029528A1 (fr) * 2004-09-16 2006-03-23 Inviro Medical Devices Ltd. Seringue jetable sans danger conçue pour empecher les blessures avec les aiguilles et pour empecher toute reutilisation
WO2006074224A2 (fr) * 2005-01-05 2006-07-13 Inviro Medical, Inc. Procede et appareil pour controler la distribution de seringues de securite
EP1754499A1 (fr) * 2005-08-19 2007-02-21 Wei-Shui Wu Seringue hypodermique de sécurité à support d'aiguille rétractable
US20080097303A1 (en) * 2006-06-02 2008-04-24 Chih-Hsiung Chen Syringe with retractable needle
US20080154212A1 (en) * 2006-12-26 2008-06-26 Stat Medical Devices, Inc. Syringe with retractable needle support
US9352093B2 (en) * 2007-04-13 2016-05-31 The Lexington Group, L.L.C. Vacuum retractable syringe safety device
US9474868B2 (en) * 2008-03-31 2016-10-25 Covidien Lp Single-use syringe assembly
ITRM20120514A1 (it) * 2012-10-26 2014-04-27 Mauro Pepe Siringa monouso con ago retrattile.

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US4986813A (en) * 1988-02-01 1991-01-22 The MadTech Group, Inc. Disposable hypodermic syringe
US4995874A (en) * 1989-06-23 1991-02-26 Strickland H Allen Disposable syringe device

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Publication number Priority date Publication date Assignee Title
US4030208A (en) * 1976-01-15 1977-06-21 The Singer Company Seat vibration system for simulating aircraft buffeting
US4986813A (en) * 1988-02-01 1991-01-22 The MadTech Group, Inc. Disposable hypodermic syringe
US4995874A (en) * 1989-06-23 1991-02-26 Strickland H Allen Disposable syringe device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008132462A1 (fr) * 2007-04-27 2008-11-06 Safeguard Biosystems Holdings Limited Dispositif d'échantillonnage

Also Published As

Publication number Publication date
US5346474A (en) 1994-09-13

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